<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist"
                border
                stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">

          <template slot-scope="scop">
            <el-row :class="['bdbottom',i1===0?'bdtop':'', 'vcenter']"
                    v-for="(item1,i1) in scop.row.children"
                    :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable
                        @close="removeRightById(scop.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>

              <!-- 渲染二级和三级权限 -->

              <el-col :span="19">
                <!--通过for循环嵌套渲染二级权限  -->
                <el-row :class="[i2===0?'':'bdtop', 'vcenter']"
                        v-for="(item2,i2) in item1.children"
                        :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success"
                            closable
                            @close="removeRightById(scop.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning"
                            v-for="(item3) in item2.children"
                            :key="item3.id"
                            closable
                            @close="removeRightById(scop.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
              <!-- <pre>
             {{scop.row}}
           </pre> -->
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称"
                         prop="roleName"></el-table-column>
        <el-table-column label="角色描述"
                         prop="roleDesc">
        </el-table-column>
        <el-table-column label="操作"
                         width="300px">
          <template slot-scope="scops">
            <el-button size="mini"
                       type="primary"
                       icon="el-icon-edit">编辑</el-button>
            <el-button size="mini"
                       type="danger"
                       icon="el-icon-delete">删除</el-button>
            <el-button size="mini"
                       type="warning"
                       icon="el-icon-setting"
                       @click="showSetRightDialog(scops.row.id)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限"
               :visible.sync="setRightDialogVisible"
               width="50%"
               @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist"
               :props="treeProps"
               show-checkbox
               node-key="id"
               default-expand-all
               :default-checked-keys="defKeys"
               ref="treeRef"></el-tree>

      <span slot="footer"
            class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary"
                   @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示和隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 这是树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children',

      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的Id
      roleId: ''


    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }
      this.rolelist = res.data
      console.log(this.rolelist);
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      //  弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除!')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败!')
      }
      //  this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败!')
      }
      // 获取到的权限数据保存到data中
      this.rightslist = res.data
      console.log(this.rightslist);
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true

    },
    // 通过递归的形式获取角色下所有三级权限的id保存到 defKeys数组中
    getLeafKeys (node, arr) {
      // 如果当前node节点不包括children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      }
      this.$message.success('分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style>
.el-Tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bottom {
  border-bottom: 1px solid#eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
